| MathAcos Method |
Returns the angle whose cosine is the specified number.
Namespace: System
Assembly: mscorlib (in mscorlib.dll) Version: 4.0.0.0
SyntaxC#
public static double Acos( double d )
Parameters
- d
- Type: SystemDouble
A number representing a cosine, where d must be greater than or equal to -1, but less than or equal to 1.
Return Value
Type: DoubleAn angle, θ, measured in radians, such that 0 ≤θ≤π-or- NaN if d < -1 or d > 1 or d equals NaN.
See Also